Active anti-roll bars have recently found greater acceptance among premium car
manufacturers and optimal application of this technology has emerged as an important
field of research. This thesis investigates the potential of implementing active
anti-roll bars in a passenger vehicle with the purpose of increasing customer value.
For active anti-roll bars, customer value is defined in terms of vehicle’s ride comfort
and handling performance. The objective with this thesis is to demonstrate
this value through development of a control algorithm that can reflect the potential
improvement in ride comfort and handling.
A vehicle with passive anti-roll bars is simulated for different manoeuvres to
identify the potential and establish a reference for the development of a control
algorithm and for the performance of active anti-roll bars. While ride is evaluated
using single-sided cosine wave and single-sided ramps, handling is evaluated using
standardized constant radius, frequency response and sine with dwell manoeuvres.
The control strategy developed implements a combination of sliding mode control,
feed forward and PI-controllers. Simulations with active anti-roll bars showed
significant improvement in ride and handling performance in comparison to passive
anti-roll bars. In ride comfort, the biggest benefit was seen in the ability to
increase roll damping and isolating low frequency road excitations. For handling,
most significant benefits are through the system’s ability of changing the understeer
behaviour of the vehicle and improving the handling stability in transient manoeuvres.
Improvement in the roll reduction capability during steady state cornering is
also substantial.
In conclusion, active anti-roll bars are undoubtedly capable of improving both
ride comfort and handling performance of a vehicle. Although the trade-off between
ride and handling performance is significantly less, balance in requirements is critical
to utilise the full potential of active anti-roll bars. With a more comprehensive control
strategy, they also enable the vehicle to exhibit different driving characteristics
without the need for changing any additional hardware.

BibTeX @mastersthesis{Gustafsson2017,author={Gustafsson, Jacob and Agrawal, Harshit},title={Investigation of active anti-roll bars and development of control algorithm},abstract={Active anti-roll bars have recently found greater acceptance among premium car
manufacturers and optimal application of this technology has emerged as an important
field of research. This thesis investigates the potential of implementing active
anti-roll bars in a passenger vehicle with the purpose of increasing customer value.
For active anti-roll bars, customer value is defined in terms of vehicle’s ride comfort
and handling performance. The objective with this thesis is to demonstrate
this value through development of a control algorithm that can reflect the potential
improvement in ride comfort and handling.
A vehicle with passive anti-roll bars is simulated for different manoeuvres to
identify the potential and establish a reference for the development of a control
algorithm and for the performance of active anti-roll bars. While ride is evaluated
using single-sided cosine wave and single-sided ramps, handling is evaluated using
standardized constant radius, frequency response and sine with dwell manoeuvres.
The control strategy developed implements a combination of sliding mode control,
feed forward and PI-controllers. Simulations with active anti-roll bars showed
significant improvement in ride and handling performance in comparison to passive
anti-roll bars. In ride comfort, the biggest benefit was seen in the ability to
increase roll damping and isolating low frequency road excitations. For handling,
most significant benefits are through the system’s ability of changing the understeer
behaviour of the vehicle and improving the handling stability in transient manoeuvres.
Improvement in the roll reduction capability during steady state cornering is
also substantial.
In conclusion, active anti-roll bars are undoubtedly capable of improving both
ride comfort and handling performance of a vehicle. Although the trade-off between
ride and handling performance is significantly less, balance in requirements is critical
to utilise the full potential of active anti-roll bars. With a more comprehensive control
strategy, they also enable the vehicle to exhibit different driving characteristics
without the need for changing any additional hardware.},publisher={Institutionen för tillämpad mekanik, Fordonsteknik och autonoma system, Chalmers tekniska högskola},place={Göteborg},year={2017},series={Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, no: 2017:30},keywords={Active anti-roll bar, suspension, chassis, vehicle dynamics, handling, ride comfort, roll, yaw, PI-controller, sliding mode controller},}

RefWorks RT GenericSR ElectronicID 250515A1 Gustafsson, JacobA1 Agrawal, HarshitT1 Investigation of active anti-roll bars and development of control algorithmYR 2017AB Active anti-roll bars have recently found greater acceptance among premium car
manufacturers and optimal application of this technology has emerged as an important
field of research. This thesis investigates the potential of implementing active
anti-roll bars in a passenger vehicle with the purpose of increasing customer value.
For active anti-roll bars, customer value is defined in terms of vehicle’s ride comfort
and handling performance. The objective with this thesis is to demonstrate
this value through development of a control algorithm that can reflect the potential
improvement in ride comfort and handling.
A vehicle with passive anti-roll bars is simulated for different manoeuvres to
identify the potential and establish a reference for the development of a control
algorithm and for the performance of active anti-roll bars. While ride is evaluated
using single-sided cosine wave and single-sided ramps, handling is evaluated using
standardized constant radius, frequency response and sine with dwell manoeuvres.
The control strategy developed implements a combination of sliding mode control,
feed forward and PI-controllers. Simulations with active anti-roll bars showed
significant improvement in ride and handling performance in comparison to passive
anti-roll bars. In ride comfort, the biggest benefit was seen in the ability to
increase roll damping and isolating low frequency road excitations. For handling,
most significant benefits are through the system’s ability of changing the understeer
behaviour of the vehicle and improving the handling stability in transient manoeuvres.
Improvement in the roll reduction capability during steady state cornering is
also substantial.
In conclusion, active anti-roll bars are undoubtedly capable of improving both
ride comfort and handling performance of a vehicle. Although the trade-off between
ride and handling performance is significantly less, balance in requirements is critical
to utilise the full potential of active anti-roll bars. With a more comprehensive control
strategy, they also enable the vehicle to exhibit different driving characteristics
without the need for changing any additional hardware.PB Institutionen för tillämpad mekanik, Fordonsteknik och autonoma system, Chalmers tekniska högskola,PB Extern, UPL-instans,T3 Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, no: 2017:30LA engLK http://publications.lib.chalmers.se/records/fulltext/250515/250515.pdfOL 30